middleAuth.close();
            endAuth.close();
        }
    }

    /**
     * Test constant-time comparison with various password lengths.
     */
    @Test
    public void testConstantTimeWithDifferentLengths() throws Exception {
        char[] password1 = "short".toCharArray();
        char[] password2 = "verylongpasswordthatisdifferent".toCharArray();